Efficiency and Fluctuation in Tight-Coupling Model of Molecular Motor

TL;DR

This paper introduces a simple tight-coupling model for a molecular motor, enabling explicit calculations of efficiency and velocity, and uses simulations to validate theoretical results.

Contribution

It presents a novel tight-coupling model for molecular motors with explicit efficiency and velocity calculations, and compares theoretical predictions with Langevin simulations.

Findings

Efficiency and velocity are explicitly calculable.

Diffusion constant estimated via fluctuation theorem.

Simulation results agree with theoretical calculations.

Abstract

A simple tight-coupling model of a molecular chemical engine is proposed. The efficiency of the chemical engine and its average velocity can be explicitly calculated. The diffusion constant is evaluated approximately using the fluctuation theorem. Langevin simulations with stochastic boundary conditions are performed and the numerical results are compared with theoretical calculations.